Versions (3)
Version DetailsCurrent
Rev: 1 • Dec 27, 2023, 12:00 PMET MALWARE Observed TA451 FalseFont Backdoor Related Domain (digitalcodecrafters .com in TLS SNI)
alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed TA451 FalseFont Backdoor Related Domain (digitalcodecrafters .com in TLS SNI)"; flow:established,to_server; tls.sni; dotprefix; content:".digitalcodecrafters.com"; endswith; fast_pattern; reference:url,twitter.com/MsftSecIntel/status/1737895717870440609; classtype:domain-c2; sid:2049859; rev:1; metadata:attack_target Client_Endpoint, created_at 2023_12_27, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_12_27, reviewed_at 2024_03_29, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)
Dec 27, 2023, 12:00 PM
Dec 27, 2023, 12:00 PM
Sep 21, 2024, 3:00 AM
Aug 15, 2025, 8:34 PM
rules/emerging-malware.rules